PREFACE TO THE FOURTH EDITION
In this Fourth Edition of a work which, since its first appearance in August, 1906, has had a very favourable reception among English-speaking Esperantists in all parts of the world, advantage has been taken of the necessity for reprinting the work, to make a thorough revision of the text, and to introduce some other improvements.
Major-General Cox, born 1838, the author of the Commentary, died on 27th October, 1909, and the revision of the work has been carried out under the direction of the British Esperanto Association (Incorporated).
Footnotes to the Preface to the First Edition have been introduced to record facts not known to the author at the time.